Grain-bin ventilator.



PATENTED 00116, 19013.

H. A. HANNUM. GRAINBIN VENTILATOR.

APLIGATION RILED MAY 21, 1903.

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the substances stored in the bin.

- tors, of which the following, taken in con nec- UNirsn STATES Patented october e, 190s."

HENRY A. HANNUM, or ,clizniiovim NEW Yeux.

GRAIN-BIN VENTILATOR.

SPECIFICATION forming part of Letters Patent No. 740,754, dated October 6, 1903.

Application tiled May 2l, 1903. Serial No. 158,213. (No model.)

State of New York, have invented new and useful Improvements in Grain-Bin Ventila-Y tion with the accompanying drawings, is a full, clear, and exact description.

The object o f this invention is to provide simple, convenient, durable,` and efficient means for Ventilating the interior of bins or cribs containing grain or other lsubstances which are liable to lie too compactly to permit sufficient permeationA of air necessary to prevent heating and the resultant injury to For the attainment of this object my invention consists mainly, in the combination with a grain-bin, cfa ventiduct extending through the interior of said bin and formed of incorrodible wire or rod curved -spirally and with interstices between the helices, and the invention also consists in certain novel details of construction, as hereinafter described and claimed. p

In the drawings hereto annexed, Figures l and 2 are transverse and longitudinal sections, respectively, of a corn crib or bin embodying my invention.. Fig. 3 is a transverse sectional view of a portion ofv a bin equipped with my improved ventilator, designed more particularly for a bin containing wheat or rye or barley or other small grain; and Fig. fl is an enlarged perspective view of a section ofthe ventiduct embodying a modification of my invention.

a represents a crib or bin, which may be of anysuitable shape and dimensions, according to the quantity and species of grain to be stored therein.

b denotes myimproved ventiduct, which extends through the interior ofthe bin a, either lengthwise or crosswise thereof, and has its ends disposed to receive air from the exte-V rior of the bin and allow said air to permeate the entire mass of grain stored in said bin. I form this ventiduct of a spirally-wound wire or light rod, of steel or iron or other suitable metal of sufficient strength to prevent the spirals from being crushed by the weight of the grain pressing against them. To guard against corrosion of the said spirals, I coat them with suitable paint or l form the spirals of tinned wire or incorrodible metal. To allow the air to freely radiate through the sides of the ventiduct, I form the said ventiduct with spaces or interstices c c between the successive helices, which interstices constitute air-vents extending in spiral direction 6o lengthwise of the ventiduct.

,v When the described ventiduct is to be applied tothe species of bin which is formed with Ventilating-slots through its Walls, as is the case in the construction of bins for corn in the ears, the said ventiduct may be terminated inside of the bin, at short distances `from the walls thereof, so as to allow th ends of the ventiduct to communicate with t e air entering through the slots of the bin, as illus- 7o trated in Figs. l and 2 of the drawings.

s In cases where the walls of the bin are formed with close joints and the bin is designed tov contain wheat or other small grain I form the ventiduct with very narrow inter- 7 5 slices between the successive helices, which may be accomplished, either by compressing endwise the spirals or by inserting two or more spirals one within the other, as represented in Fig. 4: of the drawings.

' To'properly support the last-described form of ventiduct in the bin, I provide the walls of the bin with apertures into which I insert airinduction tubes t t, extending transversely through said walls and suitably connected at their inner ends to the ends of the ventiduct l?.

lVhen my invention is to be used in a bin of considerable size, I employ a plurality of ventiducts b b, preferably disposed transversely in the bin and distributed to allot to each 9o ventiduct a separate portion of the interior of the bin.

I/Vhat I claim as my invention isl. The combination, with a grain-bin, of a ventiduct extending through the interior of said bin and formed of a wire or rod curved spirally and with intersticcs between the helices as set forth.

2. The combination, with a grain-bin, of a ventiduct extending through the interior of Ioo the bin and having its ends disposed to cominsertedA one WLhin the other and each municate with the air at the exterior of the formed with interstioes between the helices bin and formed of Wire curved sprally and as set forth.

with interstices between the helices. HENRY A. HANNUM. 5 3. The combination, with a grain-bin, of a Witnesses:

Ventiduot exendingthrough the bin and Come J. J. LAASS,

posed of a plurality of spirally-curved Wires G. VAN VORST. 

